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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2022
Sep. 30, 2021
Current assets:    
Cash and cash equivalents $ 75,896 $ 120,517
Restricted cash 3,351 3,350
Receivables, net 6,849 3,167
Expendable parts and supplies, net 26,255 24,467
Prepaid expenses and other current assets 7,608 6,885
Total current assets 119,959 158,386
Property and equipment, net 1,064,349 1,151,891
Intangible assets, net 6,281 6,792
Lease and equipment deposits 8,371 6,808
Operating lease right-of-use assets 79,706 93,100
Deferred heavy maintenance, net 5,289 3,499
Assets held for sale 36,528  
Other assets 32,873 36,121
Total assets 1,353,356 1,456,597
Current liabilities:    
Current portion of long-term debt and finance leases 111,671 111,710
Current portion of deferred revenue 2,675 6,298
Current maturities of operating leases 16,601 32,652
Accounts payable 76,733 61,476
Accrued compensation 10,285 12,399
Other accrued expenses 31,406 33,657
Total current liabilities 249,371 258,192
Noncurrent liabilities:    
Long-term debt and finance leases, excluding current portion 521,457 539,700
Noncurrent operating lease liabilities 29,936 33,991
Deferred credits 3,508 3,934
Deferred income taxes 53,281 69,940
Deferred revenue, net of current portion 26,868 28,202
Other noncurrent liabilities 36,394 34,591
Total noncurrent liabilities 671,444 710,358
Total liabilities 920,815 968,550
Commitments and contingencies (Note 16)
Stockholders' equity:    
Preferred stock of no par value, 5,000,000 shares authorized; no shares issued and outstanding
Common stock of no par value and additional paid-in capital, 125,000,000 shares authorized; 36,126,724 (2022) and 35,958,759 (2021) shares issued and outstanding, 4,899,497 (2022) and 4,899,497 (2021) warrants issued and outstanding 257,923 256,372
Retained earnings 174,618 231,675
Total stockholders' equity 432,541 488,047
Total liabilities and stockholders' equity $ 1,353,356 $ 1,456,597